68215855 has 8 divisors (see below), whose sum is σ = 81919872. Its totient is φ = 54532128.

The previous prime is 68215853. The next prime is 68215879. The reversal of 68215855 is 55851286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68215855 - 2¹ = 68215853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68215853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3714 + ... + 12256.

It is an arithmetic number, because the mean of its divisors is an integer number (10239984).

Almost surely, 2^68215855 is an apocalyptic number.

68215855 is a deficient number, since it is larger than the sum of its proper divisors (13704017).

68215855 is a wasteful number, since it uses less digits than its factorization.

68215855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10145.

The product of its digits is 96000, while the sum is 40.

The square root of 68215855 is about 8259.2890129841. The cubic root of 68215855 is about 408.5969391412.

The spelling of 68215855 in words is "sixty-eight million, two hundred fifteen thousand, eight hundred fifty-five".